Re: [PATCH v29 23/32] x86/cet/shstk: Add user-mode shadow stack support

Borislav Petkov
2021-08-27T18:20:28Z

On Fri, Aug 27, 2021 at 11:10:31AM -0700, Yu, Yu-cheng wrote:
> Because on context switches the whole xstates are switched together,
> we need to make sure all are in registers.

There's context switch code which does that already.

Why would shstk_setup() be responsible for switching the whole extended
states buffer instead of only the shadow stack stuff only?

--
Regards/Gruss,
Boris.